Chapter 1. General Provisions - California Probate Code Section 21103

21103. The meaning and legal effect of a disposition in an
instrument is determined by the local law of a particular state
selected by the transferor in the instrument unless the application
of that law is contrary to the rights of the surviving spouse to
community and quasi-community property, to any other public policy of
this state applicable to the disposition, or, in the case of a will,
to Part 3 (commencing with Section 6500) of Division 6.